Calculator for balances.



Patented Apr. 28,1914

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APPLIOATIOI FILED 00T. 6. 1010.

EMU.

Prix du K11t quanlil y A. BOYER I P. L. M. GODBAU.

oAL'oULAToB ron BALANcEs. APPLICATION FILED 00T. 6, 1910.

Patented Apr. 28, 1914.

UNITED STATES PATENT Amann BOYER, or rants, AND PIERRE Louis MARIE GoDnAU, oF BOULOGNE,

FRANCE.

CALCULATOR I BALANCES.

Specification of Letters Patent.

Patented Apr. 2e, 1914.

Application led October 6, 1910. Serial No. 585,643.

To all whom 'it may concern Be it known that we, An'rmn Boren, of 267 Rue Saint-Honor, Paris, France, senator, and PIERRE Lotus MARIE Gennari, of 59 Rue du Point du Jour,Boulogne s. Seine, France, engineer, have invented a new and useful Improvement in Calculators for Balances, which improvement is fully set forth in the following specification.

This invention relates to an apparatus which can be combined, without. the need of any alteration, with all systems of balances in which equilibrium is obtained by the aid of a traveler moving along a beam, the displacements of which are weight of the articles weighed. This apparatus gives: (a) an indication, by direct reading when equilibrium is attained of the price of the article of merchandise placed on the scale pan of the balance and in addition (b) an indication of the weight of the article or of the material balanced by the displacement by the traveler of the balance.

The present apparatus can also be provided with apparatus for printing and issuing tickets and for keeping a record and a totalizing apparatus.

The apparatus which forms the subject of this invention may advantageously be combined with the automatic balance which forms the subject of the application for patent Serial No. 585,642, of even date herewith.

The accompanying illustrative drawing shows diagrammat-ically a practical embodiment of the apparatus which forms the object of the present invention.`

Tn the drawings, Figure 1 is a diagram intended to eXplainthe principle on which the apparatus works. Fig. 2 shows rather diagrammatically one embo-diment of the apparatus arrangement disclosed in'Fg. l. Fig. 3 is a detail sectional view of the mechanism. Fig. 4 is :a detail side view showing the registering :apparatus properly so called and the ticket issuing device. Fig. 5 is a yside view of one .of the registering wheels.

Figs. 6 'and 7 are respectively a view of the ticket and a view of part of the record.

The working of an apparatus made in accordance with this invention is based on the following principle The weight of a given quantity of substance being kno-wn, the total cost of suchquantity may be obtained from such weight and from the price of the unit proportional to the wei ht of the substance.` If for example, whi e the weight remains constant, the price of a unit of weight be doubled, the total cost will be likewise increased in the pro-portion of two to one. If the price of the unit remain the same and the weight be doubled, the increase in the total cost will be in the same proportion as that of the Weight. Lastly, if the weight and the price of a unit of weight both vary the total cost will also vary in a proportion which will be a function of the two varia-tions ofv weight and price. This principle can be readily utilized 1n practice in a very simple fashion by means of a beam the fulcrum of which can be varied accordin to the variations in the price of a unit o weight and one of the arms of which is displaced proportionately to the ascertained weight of the article, thev displacements of the other arm being in con- 'sequence functions of this weight and of the position of the fulcrum ofthe lever and therefore proportional to the tot-al cost of the article weighed.

In the diagram shown in Fig. l the beam mentioned above is represented by the line a one end of which, A, is connected in any suitable manner to the traveler of the balance with which the apparatus is combined and is displaced proportionately to the weight of the substance placed on the scale pan of the balance. The other end B of the beam a is intended to indicate by its displacement the total cost of the substance weighed. The displacement-s of the point B vary according to the position of the center C of oscillation of the beam a. By shifting this center in any convenient way we can easily obtain displacements of the point B corresponding to the total cost of the substance the weight of which is indicated by the position of the point A. To each position of the point C there corresponds therefore a price of a unit of weight and vice versa. When for example the point C is coincident with the point B, the displacements-of this point- B will vanish, which corresponds to the theoretical case of a substance the unit weight of which has a vanishing value. If on-the other hand the point C is so situated that for example the distance B C is equal to one fifth of the distance A C, the displacement of B will be, naturally, equal to one fifth of that of A. If we wish the point B to have a displacement double that whichl it had in the case last mentioned while the dis lacement of A.

remains the same, we must s ift the point C toward the point A until the point B is displaced through a distance equal to two fifths of the displacement of A. The quantity weighed remainin the same and the total cost indicated y B having been doubled, the price of a unit of Weight indicated by C. will likewise have been doubled. We may thus obtain for each price of the unit of weight a perfectly definite position for the center of oscillation C which position may be marked once for all. rlhere can 1 readily be arranged a form of construction oi'l an apparatus in accordance with what has been above set out: the point C will be represented by a slide carrying the pivot of the beam a and moving along a graduated scale showing the price of the unit of weight: the point B will move over a scale showing the total cost and lastly the point A may also be provided with a scale showing the weight and repeating thereiore the indications oi the balance. We may remark on the other hand that the divisions of the scale over which the point C moves will not be equidistant; the distances between these points will diminish on the contrary progressively `trom the point B toward the point A.. The construction of such a scale not being very practicable we can obviate the difficulty by proceeding in the following way: Let us take on the beam a an extreme position C1 for the center of oscillation such point corresponding to a maximum m of the price of a unit of weight, for example of a kilogram. lf now we weigh fn, kilograms o a substance., the beam will take up the position A1 C1 B1; the distance A A1 will correspond to n kilogram and if the distance B C1 correspond to m francs per kilogram (the maximum assumed for the price of a unit of weight, expressed for example in francs per kilogram) the distance B B1 will correspond to a total cost of m n francs. Let us now take any point l) and connect it to the point B and to the point C1. We may thus obtain a triangle B C1 D having its apex at C1 and its base B l). It we find in this base B D a point E dividing the line B D in the same ratio as the point C1 divides the line A B, let us say for example in the ratio of one to two, if C1 be the middle point of A B, and if we connect this point 4 by the line b to the point C1 we shall get the following result If we subdivide the part E C1 of the line b into equal parts and if we join the points F F1, &c., so obtained to the point D by the straight lines c c1, &c., thesek lines prolonged beyond the line b will intersect the side B C1 of the triangle at points C2 C3, Snc. The lines d1 d2, etc., connecting the point A1 to the points C2 C3, etc., will intersect the line B B1 in points B2 B3, etc.,

at equal distances from one another. In the case assumed above, in which the distance B B1 corresponds to mX/n. francs the cost of n kilograms at m francs per kilogram, we may for example divide the line E C1 into m equal parts and by proceeding in the inanner described we shall obtain m subdivisions of the line B B1 each of these subdivisions corresponding to the price of n kilograms of a substance, the price of avunit of weight of which is successivel l, 2, 8, m each division of the line E 1 corresponding to a different price. By increasing the division of E C1 we may obtain as large a number as we wish of different values of the unit of weight, values which increase gradually from zero up to m the maximum assumed for the price of the unit of weight. The practical construction of such an apparatus may be carried out in the following Way A slide C corresponding to the shifting point mentioned above, is mounted on a lever pivoted at l) and corresponding to the lilies c c1 of the diagram; along a ixed guide corresponding to the line Z) moves a slide holding the lever which carries the slide C. When this lever moves to each of the points F, it displaces the slide C in such a way that the beam A C B which corresponds to the lines d 051 of the diagram, divides by its end B the line B B1L into parts corresponding to unity (the points B2 B3, &c.). We can therefore provide the fixed guide (the line b) with an equally divided scale giving the different prices of a unit of weight which was impossible if this scale were placed along the line a.

Figs. 2 and 7 of the accompanying drawing show a form of construction of the apparatus in which instead of scales for showing the Weight, the price of a unit of weight and the total cost, dials are employed for the same purpose. Theapparatus corresponds precisely to the diagram Fig. 1, only the necessary mechanism being added. The beam is constructed as a slotted rod 1, connected by a pivot 3 at one end to a rack 2 moving in guides and at the other end by a pivot 4 to a rack 5 also moving in guides. The pivots 3 and 4 can move within the rod l so as to permit of the racks 2 and 5 moving vertically in spite of the variations in the inclination of the beam 1. ln a fixed horizontal slot 6 moves a slide 7 and in a slot 8 in a lever 9 rocking on a pivot l() moves a slide 11. Lastly a slide 12 can move along the slot of the beam 1. 11 and 12 are connected together 'by a pin 18 which allows the levers 1 and 9 to form any angles with one another and with the fixed guide 6, and which also constitutes a shifting fulcrum about which the beam turns. Slide 12 thus serves as a movable support for the fulcrum. Cn a fixed rod 14 serving as a guide can move a sleeve l5 The slides 7, y

' ing) of the mamas carrying a rack 16. This sleeve is pivoted on a piece -17 'which can slide along the rocking -lever 9 in a -xed path. rThe rack 2 meshes with a toothed lpinion 18 fast with adrum 18l around which is wrapped a cord 20 connected -to the traveler 20l of the balance with which the apparatus is actin a. counterpoise 20 bein secured to the ee end of the cord to maintain ythe same under proper tension. By the connection formed )y the rack 2, the inion 18, the drum 18 and the cord 20, t e displacements of the correspondin end (the right, in the draweam 1 are thus made propor tional -to the displacement of the traveler and consequently to the weight of the article on the pan of the balance. The drum 18vl carries also a toothed wheel 19 which serves to actuate by means ofthe pinions 21 andY 22 a pinion 23 actuating as is explained below dials 24 and 25 behind an aperture 26 in the casing so as y.to indicate the weight corresponding to the displacement of the beam 1. At its `other end this 'beam engages lby the pivot 4 the rack 5 which is so guided that it can only move vertically. This rack meshes with a pinion 27 fast with a toothed .wheel 28 which actuates by means of a pinion 29 and a wheel 30 fast .with it, the pinion 31. This last pinion 31 actuates as will be described later dials 32, 33, 34 behind an aperture 35. These dials, the displacements of which are proportional to those of the end (the left, in the drawing) of the beam 1, indicate in accordance with the principle on which the apparatus is constructe the total cost of the'substance weighed. Lastly the rack 16 can be displaced along the rod 14 by means of a 1nion 36, which also actuates through a w eel 37 a pinion 38, which in its turn serves to actuate the dials 39 and 40 which can be seen through an aperture 41. Though these dials are provided with equal sub-divisions they show, just as has been described with reference to the diagram of Fig. 1, owing to the action of the lever 9 and the sleeve 15,

the displacements of the slide 7 along the slot 6 and consequently the different prices of a unit ofgweight. The method of actuating the dials 39 and 40 as also that of the dials 32, 33, 34 and 24, 25 is represented in Fig. 3. The pinion 31 is mounted on a hollow arbor 42 which carries at one end the dial 34 and at the other end a wheel 43 to be described later. us say, twenty graduations, each corresponding to `five centimes. A complete revolution of this dial is therefore equivalent to one franc. The wheel 43 carries a finger 44 which at leach revolution by means` of wheels 45, 46 and 47 moves a second wheel 48 one tenth of a revolution. This wheel is fast on a hollow arbor 49 carrying at its other end the dial' 33, which has ten --inounted :the dial 39 and The dan ai has, la

graduations representing francs. Lastly the wheel 48 is provided with a finger 50 .actuating by pinions 51, 52, 53l a third wheel 54 fast on a hollowarbor 55 which carries at itsvend the dial 32 which is moved en a tenth of a revolution for each comyplete revolution of the dial 33. The dial 32 fas ten graduations each of which represents ten francs. On an arbor 56 are inion 38 fast with one another. At its ot er end the arbor 56 carries a wheel .57 which by means of a finger 58 and pinions 59, 60 and 61 ac- 'tuates a wheel 62 which makes one tenth of `a revolution for each com lete revolution of the wheel 57. The whee 62 is mounted loosely on the arbor 4'56 which carries running loose upon its other end the dial 40. The dial 39 carries a' finger 39'L which at each revolution by the aid of. Wheels 63 moves on the dial 40 one tenth of a. revolution. The dial 39 has twenty graduations,

each equivalent to five centimes and the dial 40 has ten graduationsk represent-ing francs. The pinion 23 is fast with the dial 24 on the arbor 64 which also`carries a toothedwheel 65 meshing with a toothed wheel 66 fast with a wheel 67. By means of a finger 68 and wheels 69 and 70, the wheel 67 causes at each revolution a wheel 71 to move through, one hundredth of a revolution. The dial 24 carries a linger 24a which by means of the wheels 72 causes the dial 25 to move through one hundredth of a revolution for each revolution of the dial 24. rl`he dial 24 is divided into a hundred parts each corresponding to la gram; the dial 25 is likewise divided into a hundred parts each representing a hectogram, that is to say when the maximum load of the balance is ten kilograms; should the maximum load be greater than this we should provide more dials, etc. The Wheels 43, 50, 54, 57, 62, 67, and 70 have upon them relief figures corresponding respectively to the indications on the dials 34, 33, 32, 39, 40, 24and 25. As is shown in Fig. 5 for one of these' Wheels, each of them carries two rows of figures, the figures of one row being removed 180 from the same figures in the other row. These wheels serve to print the tickets and a recording tape, the two operations being effected simultaneously by means of the arrangement shown in Fig. 4. Beneath the printing wheels (of which only those numbered 57 and 67 are to 'be seen in Fig. 4) are arranged two drums 73 and 74. A tape of paper or card' 75 is unwound from'drum 73 and Wound up on drum 74 after passing between a driving pulley 76 and a guide pulley 77. A second tape of aper or card 78 is unwound from a. drum 79 and passes between the pulley 76 and a roller 80, thence over the printing wheels parallel to the tape 75 which passes beneath them in the opposite direction. l, The tapes can be pressed against the printing wheels 4by rocking arms 81, 82 actuated by means of a rod 83 provided with a hook .84. The arms are so shaped as only to press the tapes upon the figures of one row but since these figures arel 180 apart in the two rows, the same figures are printed on both tapes. The rod 83 also has on it a lug 85 which by means of a pawl 86 and a ratchet 87 turns, each time it is actuated, the pulley 76 through a certain angle, which pulley therefore feeds each band forward the length of a ticket. Lastly a second lug 88, actuates by means of a link 89, a knife 90 which cuts the tape 7 8 into tickets. The tape 75 on the other hand which -serves as a record remains uncut and is wound on the drum 74.

l*1 6 shows a ticket as it is severed from the tape 78 by the knife 90. rFhis ticket bears indications of the weight of the goods, the price of a unit ot weight and the total cost of the goods. it is obvious that to the printing wheels described may be added other printing devices for printing on the tickets other matter such as numbers, dates, the name of the shop, etc.

"With the registering mechanism described may be combined any type of totalizer. As is shown in F ig. 3, a totalizer 91 may be connected through gearing 92 with the registering mechanism. As is seen in Fig. `7 which is a view of part of the recording tape corresponding to the ticket of Fig. 6 the total may also be printed on the recording tape.

The working of the apparatus is as follows: lfVhen goods are to be weighed and theJ-total cost thereof is to be calculated at the saine time, in the first place the rack 16 is moved by means of the pinion v36, which may be rotated by any suitable means such as crank 36a, until the dials 39 and 40 show at the aperture 41 the price of a unit of weight-in the example chosen 3.40 francs. If we now place the goods upon the scale pan of the balance with which our apparatus is supposed to be connected, the traveler or poise of the balance moves automatically in the case of the automatic balance referred to; in the case of ordinary balances, it is moved by hand. In both cases the cord 20 transmits the movement of the traveler to the end of the beam 1, and the dials 24, 25 show at the aperture 26, the weight ot the goodsin the example chosen 4.250 kilograms. At the same time the other end of the beam 1, the displacement of which is proportional to the product of the number of units of weight into the price per unit, acts on the dials 32, 33, 34 which exhibit at the aperture 35 the total cost-in the example chosen 14.45 francs. The printing wheels are set at the same figures as are shown by the corresponding dials and it'` 'carry out the 'following operation:

we now pull out the rod 83, the arms 81, 82 will cause indications ofthe wei ht, etc., to be printed on the ticket tape an on the recording tape. The arms are now returned to their normal position by any suitable means, such as spring 84, and the rod 83 continuing its travel causes the ta es to be fed forward the length of a ticket y acting on the-ratchet 86 and then severs the ticket by means of the knife 90. The goods are then removed from the pan of the balance.

It the apparatus described be combined with the automatic balance referred to, it

is convenient to employ the rod 83 to return the traveler of the said balance to its zero position. This may be accomplished in any convenient way. In the present instance, the rod 83 may be provided with an extension or arm 83EL pivoted thereto and provided with a terminal fork, the lower member 83*J of which is arranged to engage the traveler, -While the Aupper member 83c is arranged to come in contact at the proper time with a cam 83d whereby the arm 832L is lifted out oi` engagement with the traveler when the latter has been pushed to its zero position. ln the case of an ordinary balance, the traveler will be returned to its zero position by hand. As soon as the traveler has regained its zero position, the beam l will return lto the horizontal and all the dials and printing wheels will be brought back to zero. When the rod 83 has been pushed back, the apparatus is ready for another operation, for which it is suiicient to set the dials 39 and 40 according to the price per unit of weight of the new goods to be weighed.

With this apparatus we can equall Well nowing the price per unit of weight of a substance and also the amount that it is desired to spend on the purchase of an unknown quantity of such substance, we can ascertain without calculation the corresponding weight in the 'following wayz-The dials 39 and 40 being set according to the price per unit weight, suiicient of the substance is placed upon the scale pan to cause the dials 32, 33 and 34 to show the total amount desired; the dials 24, 25, will then show the corresponding weight. 1

While in the example shown the subdivisions are decimal, it is obvious that subdivisions may be onany other scale, as for instance, on a scale adapted to ordinary weights and measures. The weights given are in kilograms and grams, that is, in parts and thousandth parts, but of course they might as well be in pounds and ounces. Similarly, in lieu of francs and centimes, the values may be in dollars and cents; or in pounds, shillings and pence.

What we claim is:

1. A cost-computing apparatus compris- 'shiftin the position-of the same along1 the `placing one end of iigbin combination, a lever or beam sup f e tances proportional to ascertained weights,

and a member movable in a fixed path and operatively connected to said' fulcrum fo! lever, t e movements of said member a ong said fixed path in shifting the fulorum being directly proportional to rice per unit weight, while the resultant eilections ot the other end of said lever are proportional to total cost.

2. A cost-computing apparatus comprising, in combination, a lever or beam supported by a movable pivot or ulcrum and arranged to turn about the same means for defiecting one end of'said lever t rough distances proportional to ascertained Wei hts, mechanism for moving said fulcrum a ong said lever, a guide and a member moable along said guide for actuatin said mechanism and thereby shifting sai fulcrum, the movements of said member along said guide in shifting the fulcrum being directly propoi-tional to price per unit weight, while the resultant deflections of the other end of said lever are proportional to total cost.

3. A cost-computing weighing apparatus comprising, in combination, a beam, a fulcrum engaging said beam and about which the beam is arranged to turn, said ulcrum being movable along the beam, means for displacing one end of said beam in proportion to ascertained weights, means for indicating such displacement, a device movable in direct proportion to unit price changes, means for transmitting motion from said device to said fulcrum, such transmission means being soarranged that the resultant movement of the fulcrum along said beam is not directly proportional to unit price changes, and means for indicating the movements of the other end of said beam.

4. ln a cost-computing Weighing apparatus, the combination, with a beam and a fulc'rum for said beam movable toward either end thereof, of a movable actuating member, and means for transmitting motion from said actuating member to said ulcrum, such transmission means being so arranged that movements of said actuating member over distances equal to each other produce movements of said fulcrum over distances unequal to each other.

5. In a cost-computing weighing device, a lever, an adjustable fulcrum engaging said lever and having a support, means for dissaid lever according to a weight indication, means for indicating said displacement, means for variably displacing said support so as to cause lateral movement of said fulcrum toward or from the other end of the lever, said support-displaci'ng means having a movement,- pro rtional to a change 1n prlce per unit o weight,

means for indicating` the movement of said other end and means for recording said movement.

\ 6. In a cost-computing Weighing device, an oscillating lever, an adjustable fulcrum adapted to engage said lever at any point within "ven limits and having a support, means or displacing one end of said lever according to a Weight indication, a fixed, lineal guide, a rocking lever pivoted at one point, means for adjusting its direction by movement on said pivoted point and along said fixed guide, another fixed lineal guide arranged at an angle to the first mentioned guide, sliding connections between the rocking lever and the second-mentioned fixed guide, a sliding connectin between said support and said rocking lever, and means for indicating the movement of the other end of the oscillating lever.

7. In a cost-computing weighing device, an oscillating lever, an adjustable fulcruin having a supportand adapted to engage said oscillating lever at `any point within given limits along its length, means for displacing one end of said lever according to a weight indication, a rocking lever having a pivot and engaging said support, a lixed lineal guide extending between one extreme position which can be occupiedby said fulcrum and a point in a straight line connecting the pivot of said rocking lever with the other extreme position which can be occupied by said fulcrum, said point dividing said straight line in the same ratio as that in which the extreme position first mentioned divides the oscillating lever, a member engaging and movable along said guide and also engaging and movable along said rocking lever and means for indicating the movement of the other end of the oscillating lever.

8. In a cost-computing Weighing device, an oscillating lever, an adjustable fulcrum having a support and adapted to engage said oscillating lever at any point within given limits alongits length, means for displacing one end of said lever according to a weight indication, a rocking lever having a pivot and engaging said support, a fixed lineal guide extending between one extreme position which can be occupied by said ful- ,crum and a point in a straight line connecting the pivot of said rocking lever with the other extreme position which can be occupied by said fulcrum, said point dividing said straight line in the same ratio as that in which the extreme position first mentioned divides the oscillating lever, a member engaging and movable along said guide and also engaging and movable along| said rocking lever and means for indicating the movement of the other end of the oscillating ley. displacing one end of said lever according to a Weight indication, means for moving sald fulcrum along said lever distances corresponding to variations in price per unit of Weight, means for indicating the displacement of each end of said lever, and means for recording the indication of said indicating means.

l0. Apparatus of the character described comprising, in combination, a lever both ends of which may be displaced, an adjustable ulcrum engaging said lever, means for displacing one end of said lever according to a Weight indication, means Jfor moving said ulcrum along said lever distances corresponding to variations in price per unit of Weight, means indicating the movements of each end of said lever, and printing means actuated in accordance with the indications of said indicating means and adapted to reco-rd such indications on a tape oit paper or the like.

11. Apparatus of the character described comprising, in combination, a lever, an adjustable fulcrum engaging said lever, means for displacing one end of said lever according to a Weight indication, means for moving said fulcrum along said lever distances corresponding to variations in price per unit of Weight, means indicating the movement of each end of said lever, printing means actuated in accordance with the indications of such indicating means and adapted to record such indications on a tape, and means for issuing tickets from such tape bearing the recorded indications.

12. Apparatus of the character described comprising, in combination, a lever, an adjustable fulcrum engaging said lever, means for displacing one end of saidlever according to a Weight indication, means for moving said fulcrum along said lever distances corresponding to variations in price per unit of Weight, means indicating the movement of each endof said lever, printing means actuated in accordance with the indications of such indicating means and adapted to record such indications on a tape, means for issuing tickets from such tape bearing the recordedv indications, and means for separately registering the indications on ano-ther tape for purposes of record.

13. Apparatus of the character described comprising, in combination, a lever, an adjustablefulcmm engaging said lever, means for displacing one end of said lever according to a weight indication, means for removing said fulcru-m along said lever distances corresponding to variations in price per unit `of weight, means indicating the movement of each end of said lever, printing means actuatedfin accordance with the indications of such indicating means and adapted to record such indications on a tape, means for issuing tickets from such tape bearing the recorded indications, means for separately registering the indications on another tape for purposes of record, and a. totalizer coperating with such registering means.

14. Apparatus of the character described comprising, in combination, a lever, an adjustable fulcrum engaging said lever, means for displacing one end of-said lever according yto a Weight indication, means for moving said fulcrum along said lever distances corresponding to variations in price per unit of Weight, means `for indicating the movement of each end of said lever, means for recording the indications of said indicating means, means for issuing tickets bearing the recorded indications, and means for simultaneously actuating such recording means and issuing means, said actuating means being adapted to be connected to the traveler on the beam of a Weighing apparatus in such a manner as to return such traveler to its zero position on the beam simultaneously with the actuation of the said recording and issuing means.

15. In a computing scale apparatus, in combination, an oscillating lever or beam, a movable fulcrum upon which said lever bears, a fixed supporting guide along which said fulcrum may be moved, and a rocking lever pivoted at one end and engaging said fulcrum and arranged to move the same along said oscillating lever. y

16. In a computing scale apparatus, in combination, an oscillating lever or beam, a movable fulcrum upon Which said lever bears, a fixed supporting guide along which said fulcrum may be moved, a second fixed guide disposed at an angle to said supporting guide, and a rocking lever pivoted at one end and slidably engaging said second fixed uide and said fulcrum.

17. n a computing scale apparatus, in combination, an oscillating lever or beam, a movable fulcrum upon which said lever bears, a fixed supporting guide along which said fulcrum may be moved, a second fixed guide disposed at an angle to said supporting guide, a swinging lever pivoted near one end and slidably engaging said fulcrum to move the same along said supporting guide, a member slidably engaging said swinging lever and pivotally connected to a movable sleeve element carried by said second fixed guide and an indicating mechanism actuated y said movable element whereby the position of said swinging lever relative to said fixed guide may be indicated in suitable units.

18. In a computing scale apparatus, in combination, an oscillating lever or beam, a movable fulcrum upon which said lever bears, a fixed supporting guide along which said fulcrum may be moved, a second fixed guide disposed at an angle to said supporting guide, and a rocking lever pivoted at one end and slidably engaging said second fixed guide and said fulcrum, said guides being so positioned relative to each other that, for a given displacement of one end of said lever or beam, the changes in displacement of the other end of the lever measured perpendicularly to its zero position or position of equilibrium and produced by swinging said rocking lever to move said fulcrum along said supporting guide, are directly proportional to the corres onding distances through which said roc in lever swings measured along said second xed guide.

19. In a computing scale apparatus, in combination, an oscillating lever or beam, a movable fulcrum upon which said lever bears, a fixed supporting guide along which said fulcrum may be moved to Contact with said lever at any point between extreme ositions, a swingin lever pivoted at a xed point and engaging said fulcrum to move the same along said oscillating lever, assecond fixed guide disposed at an angle to said supporting guide ,and connecting one eX- treme osition of said fulcrum with a-point located) in a straight line between the other extreme position of the said fulcrum and the point at which said swin in lever is pivoted, the point so located (Iivi ing the rectilinear distance between said second named extreme position of said ulcrum and such pivot point in the same ratio as that in which the first named extreme position of lsoaid fulcrum divides the oscillating lever or eam.

20. In a computing scale apparatus, in combination, an oscillating lever or beam, a movable fulcrum upon which said lever bears, a fixed supporting guide along which said fulcrum may be moved, a second fixed guide disposed at an angle to said supporting guide, a rocking lever pivoted at one end and slidably enga ing said second fixed guide and said fu crum, and adapted to move said fulcrum along said oscillating lever, means for indicating the position of said fulcrum relative to said oscillating lever in terms of price per unit of weight, means forY displacing one end of said oscillating lever in accordance with a weight indication, means for indicating such displacement in units of weight` and means for indicating the corresponding displacement of the opposite end of said oscillating lever in terms of the product of the indications before mentioned, or total cost.

21. A cost-computing apparatus, comprising a lever or beam bearing on a fulcrum moving alon said beam, one end of said lever bein displaced proportionately to a weight in ication and the other end being displaced proportionately to a computed total cost, while the position of said movable fulcrum is shiftable for different prices per unit weight, means for moving said fulcrum along said lever, a guide inclined to said lever and engaged by said fulcrum-moving means, and an indicator bearing equidistant graduations corresponding to prices per unit of weight, said indicator being operatively connected to said fulcrum movlng means.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses.

ANTIDE BOYER. PIERRE LOUIS MARIE GODEAU.

Witnesses:

BARTLEY F. Yos'r, FREDERIC HARL. 

